Drilling machine



April 10, 1928. 1,665,411

R. M. GALLOWAY ET AL DRILLING MACHINE Filed Sept. v. 1.925 a Sheets-Sheet 1 Roper/26 Galloway Paul CZBwwofl @WW MQW W gags.

April 10, 1928.

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V DRILLING MACHINE Flled Sept '7 1923 April 10, 1928.

April 10, 1928. 1,665,411

R. M. GALLOWAY ET AL DRILLING MACHINE I Filed Sept- 7. 1923 .8 Sheets-Sheet 4 April 10, 1928. 1,665,411

R; M. GALLOWAY ET AL DRILLING MACHINE Filed Sept. 7, 1923 8 Sheets-Sheet' 5 xvi lium-M507 6: I Fobefi/ifi z'. Gallowgy fiul C,

R. M; GALLOWAY ET AL DRILLING monum- Fiied Sept. 7. 1923 8 Sheets-Sheet' '7 Patented Apr. 10, 1 928.

"UNITED STATES PATENT OFFICE.

ROBERT M. GALLOWAY AND PAUL C. BURTON, OF RICHMOND, INDIANA, ASSIGNORS TO THE NATIONAL AUTOMATIC TOOL COMPANY,

PORATION OF INDIANA.

or RICHMOND, INDIANA,A con- DRILLING MACHINE.

Application filed September 7, 1923. Serial No. 661,447.

This invention relates to drilling machines and its purpose is to provide improved means for increasing the efliciency and speed of operation of such machines, particularly when they are power driven. In the operation of drilling machines, it has heretofore been the common practice to move the drill head manually to and from the work to be drilled, the power feed mechanism being in operation only while the drills or other tools were passing through the work. Another method has been to permit the power feed mechanism to operate throughout the movement of the drill head. The first method involves considerable labor on the part of the operator and both methods necessarily result in a slow speed operation of the drill.

. The principal object of the present invention is to provide power driven means for automatically effecting a rapid movement of the drill head in moving the drills or other cutting tools to or from the work to be operated on, the power feed for advancing the drill head during'the drilling operation being automatically thrown into operation after the drills have reached the work while the means for effecting the rapid movement of the drill head is thrown out-of'operation until the drills have passed through the work, when the head is again moved rapidly upward. Another object is to provide improved means for effecting the rapid traverse of the drill head toward its non-working movement without interfering with the usual manual operation thereof. Still another object is to provide improved mecha- IllSIIl for controlling the movements of the drill head and means for automatically controlling the operation of that mechanism. Other objects relate to various features of 7 construction and arrangement which ,will

appear more fully hereinafter.

The nature of the invention will be understood from the following-specification taken with the accompanying drawingsin which one embodiment is illustrated. In the-drawings, Fig. 1 shows a side elevationof a multi-drllling machine embodying the improvements of the present invention; Fig.

2 shows a horizontal section on the line 2'2 of Fig. 1 looking in the direction of the arrows; Fig. 3 shows. an enlarged section on the line 33 ofF-ig. 2, looking in the direction of the arrows; Fig. i shows aside elevationof the gear casing illustratedv at the'right of Fig. 3;'Fig. 5 shows a detailed tion taken on the line 99 of Fig. 10; Fig. i

10 shows a section taken on the line 10-10 of Fig. 8; Fig. 11 is a view somewhat similar to Fig. 10 showing a part of the construction in side elevation and, showing the opposite arrangement of the two clutch members illustrated in Fig. 10; Fig. 12 is a detailed view showing a side elevation of the mechanism for preventing the simultaneous operation of the clutch for controlling the rapid traverse mechanism and the, clutch for permitting a manual operation of the drill head; Fig. 13 shows a bottom plan View of the mechanism illustrated in Fig. 12; Fig. 14 shows a side elevation of the electric switch for controlling the circuit of the rapid traverse motor; Fig. 15 shows an end elevation of the switch illustrated in Fig. 14; Fig. 16 shows a detailed section taken on the line 16-16 of Fig. 14:; and Fig. 17 shows a vertical section taken on the line 17-17 of Fig. 14:; Fig. 18 is a view of certain of the elements shown in Fig. 6 but looking in the opposite direction, showing particularly means for holding a feedworm in engagement with a cooperating worm-wheel and trip mechanism for rendering said means ineffective. Fig. 19 is a side view of a portion of the machine frame and the tool-head translatably mounted thereon, showing the various dogs for throwing in and out of the rapid traverse and slow feeding means for the tool head and the dogs for actuatin the motor control switch to start, stop an reverse the directions of,

hollow vertical standard 21 adapted to This belt is driven-by a pulley 41 fixed on carry the principal parts of the drill mecha- 'nism. ThlS standard is provided on one side with vertical guide flanges 22 which are adapted to engage the vertical guideways 23" formed on the lateral extension 24 of the drill head 25. The part 24 of the drill head has lates 26 secured thereto b bolts 27 to over ap the guide flanges 22, thus 10- eating the drill head securely on the supporting standard and permittin the vertical movement thereof. The drill ead is connected to a cable 28 which extends over a pulley 29 mounted in a slot in the upper a part of the standard on a shaft 30, an

Euitable counterweight 31 .is connected to he other end of the cable within the hollow standard 21, thus minimizing the work which must be done to move the drill head along its vertical guideway;

The drill head 25 is provided with a plurality of drill spindles 33, only two ofwhich are illustrated, and these drill spindles are actuated by suitable gears and pinions located within the drill head and driven from above .through a vertical drive shaft 34..

the shaft 42 which is journalled in bearings carried by the standard 21 and the bracket 43 mounted on the base 20. Another pulley 44'is fixed on the shaft 42 adjacent to the pulley 41 and an idler pulley 45 is rotatably mounted on the shaft adjacent to the pulley 44. A driving belt actuated by-a motor or line. shaft is 11%pted to engage the pulle s 44 and 45 and be passed from one to' t e other b means of the shifting fork 46 which is slida 1y mounted on the rod47 extending Q i between the bracket 43and the standard 21.

The fork 46-carries arms 48 adapted to extend on opposite sides of the drive beltand the sleeve is shifted 'on the rod 47 by means of a crank 49 which actuates a lever 50 connected by a link 51 tothe fork. The foregoing features of construction are common i "the standard 21-h in drilling. machines and do not in themselves constitute a part of the present invention.

The drill head 25 is moved vertically on 7 means of a rack bar 54 mounted on the si e of the standard between "thefguide flanges'22 and adapted to be engaged b .a pinion 55 mounted onthe horizontal s .aft .56 which is journaled in bearings carried by thelateral extension 24.- of

. the drill head; The shaft 56 extends through the wall of the part'fl of. the head and through a plate 57 which is secured to the side of the head, as illustrated particularly in Figs; 5'and 6. The end of the shaft 56 has a gear 58 keyed thereon and this gear is driven by a pinion 59 secured onthe shaft 60 which is journaled in a bearing 61 formed in the plate .57 and in anotherbearing 62 formed in the plate 63 which is rigidly connected to the; plate 57 adjacent to the bottom thereof by means of a transverse plate 64. 4 The plate 63 has a lateral extension 63' at one edge thereof and the plate 57 has an extension. 57 extending from the top thereof over the gears located between the plates, so that the-two plates and their projecting parts form a housing for the gearing mechanism by which the horizontal shaft 56 is driven. The hub of the pinion 59 has a worm wheel 65 secured thereon and this worm wheelis adapted to be drivenby a worm 66 splined on the vertical. shaft 67 which extends downwardly and is connected through a universal joint 68 with a shaft 69 I extending upwardly from the gear casing 70. The shaft 69 is driven through caring mechanism located in the housings 1. and 72 which contain change speed gears for varying the speed of the shaft 67 through the operation of hand levers 73 and 74. The change speed mechanism which actuates the vertical shaft 67 is driven b 'suitablegearing mechanism-from the hu of the pulley 41. this pulley havin a spiral gear fixed on its hub to mesh wit another spiral gear mounted at rightangles thereto and secured to a shaft extending into the casing .71 to I .drive the gearing mechanism located therein.

Referring now to the means for controlling the engagement of the worm wheel 65 and the worm 66 which affect the power feed of its the drill head during the drilling operation,

it will be' observed that the worm 66 is located between bearings75 and 76 formed on a bracket 77 which has an upper arm 77 and a lower am 77 adapted to extend bearms 77 and 77 of the bracket have lugs 79' extending laterally therefrom to engage the late 63 and prevent lateral turning of the racket during rotation of the shaft 67. The

bracket'77 normally tends to move outwardly away from the shaft 6.0 to effect a disengagement of the worm 66 with the worm wheel 65 due to the action of a plunger 80 which is mounted in .a sleeve 81 carried by the lateral extension 57 of the plate. 57 and actuated by a coil .spring 82 located in the sleeve. The tension of this spring may beadjusted by means of a screw plug 83 havin a lock nut 84 mounted on'the rejecting en thereof. The movement .of .t e bracket 77 and the worm 66 is controlled by a bar 85 tween the plates 57 and 63. A ball thrust which ispivoted at 86 on the plate 57 and 5 means of a lock nut 91. \Vhen the bar 85-is in its .vertical position, as illustrated in Figs. 6 and 7, the worm is in engagement with the worm wheel, and the bar 85 is normally held inthis position by means of a, latch member 92 pivoted at 92 on the lower part. of the plate 57. The latch member 92 carries a lug 93. which is adjustable thereon by means ofa screw 94 and this lug normally engages a shoulder 95 formed on the lower end of the bar 85, the lug being held in this engaging position by the action of a coil spring 96 which is connected to the outer end of the latch member 92 'and to the plate '57. The latch member 92 is formed integrally with a I cam arm 97 having an extremity 97 which is adapted to be engaged by a stationary cam or dog, during the downward travel of the drill head, as hereinafter described? The? end of the latch member 92 is provided with a notch 99 loosely engaged by a pin 100 which is fixed in the outer end of a lever101 mounted to rotate with a shaft 102 journaled in bearings carried by the plate 57 and the gear case 116, hereinafter described. The

pin 100 which projects through the end ofthe lever 101 also engages a notch 103 formed .in the lower part of the bracket 77, so that when the cam arm' 97 is operated the latch member 92 movesdownwardly to release the barand at the same time the latch member rotates the shaft 102 and thereby shifts the worm 66 out of engagement with the worm gear 65 through the engagement -of the pin with the notch in the bracket 77.

- The shaft 102 extends-horizontally toward the side of the machine, as viewed particularly in- FigsQl' and 2, and the end of the shaft has a lever 105'fixed thereon, this lever extending upwardly and being pivotally connected to a shift rod 106 which extends horizontally and has, itsother end'pivotally and which have a bar 112 connecting the connected to another lever 107. The lever 107 is fixed on a shaft 108 which. is journaled in brackets 109 secured to the front side of the head 25. The lever 107 may be rocked about its pivot by means of a handle 110 secured at the point of pivotal connection of the lever with theshift 'ro'd ,106 or the lever 107 may be operated bymeans of the crank arms 11'1 which' 'are secured to the shaft 108 upper ends thereof as shown in Fig. 2.

The, shaft 60 which serves as the intermediate shaft of the power feed mechanism,

being driven for that purposeby the worm 66 and the worm 'wheel 65, also serves as the intermediate shaft of the rapid traverse mechanism when the drill head is being rapidly raised or-lowered from and to the work being operated on. 4 For this purpose the shaft 60 is extended horizontally from the plate 63 with the end thereof journalled ,in a bearing carried by the casing 116 secured to the bracket 117 formed on the head 25. A bevel gear 118 is secured to the shaft 60 and this bevel gear is adapted to be driven by 'another bevel gear 119 secured to the end ofsthe horizontal shaft 120 which extends from the casing 116 along the side of the drill head 25 as illustrated in Fig. 2.'

The shaft 120 is adapted to be driven by a small electric motor 121 which is mounted on a bracket 122 secured tothe sideof the head 25, as shown in Fig. 8. The motor shaft 123 is connected by a coupling sleeve 124 with a shaft 125 .journalled in bearings formed in the walls of a casing 126 which is secured at its lower side to the bracket 122 while the upper part thereof is connected by a bracket 128 to the side of the drill head. A worm 129 is formed as an integral part of the shaft 125 and this worm meshes with a worm wheel 130 which is keyed on the hub 1-31-of a clutch member 131." The clutch member 131 is rotatably mounted on the bushing 132 which in turn'is mounted' on a shaft 120, a collar 133 being secured on the shaft 120 adjacent to the casing 126 to prevent longitudinal movement thereof.

A driving engagement is adapted to be f effected between the clutch member 131 and the shaft 120 by means of a-l'ongitudmally movable clutch member 134 which is splined' on a sleeve 135 secured to the shaft 120 by a Woodruff key and atransvers'e pin 136. The clutch member 134 is moved longitudinally on the sleeve 135 to bring the clutch teeth 137 into and out of engagement with each other by means of a forked operating member 140, the opposite arms of which are provided with inwardly projecting lugs 141.

adapted to engage the annular? groove 142 formed in the clutch member 134. The

clutch operating member is rigidly se- 7 cured to ,1 the shift rod 106 previously described so that when. .t

eration'by the disen agen nt of the w in 66 and the worm wheel 65,-- the shift rod 106 operates simulhe power feed mechataneously to move the member 140 and shift the clutch member134 into engagement with the clutch member 131 which is driven by the apid traverse motor 121."

he shaft 120 terminates within the sleeve 135 and the projecting end of this sleeve serves'as a bearing for a pilotshaft 145 which has its other end journalled in a bearing 146 carried by the head25. 'A hand so that when these clutch teeth are in en-- gagement with each other, the motion of the shaft is adapted to be transmitted to the shaft 120. The clutch member is reduced in diameter adjacent to the sleeve 135 and this reduced portion hasa rotative engagement with a collar 152' carrying a pin 154 which engages a recess 155 in the housing 126 to prevent the rotation of the collar with the clutch member 150.- The collar 152 serves as a support for a mechanism by which the clutch members-135 and 150 are prevented from engagement simultaneously -with theengagement of the clutch members 131 and 134. This mechanism comprises a cam 157 carried by an eccentrically located shaft 158 which is journalled in the longitudinal extension 153 of the collar l52 and secured in place by a nut 159. The cam is operated by a handle '160 which is located diametrically opposite from the axis of the shaft 158 and the horizontal portion of the handle engages. a slot 161 formed inthe head 162" of a rod 162 which-is slidably mounted in an aperture 163 formed in the end of the casing 126. The opposite end of the rod 162 is en aged by a fixed collar or nut 164 which, exten s into the annular groove-142 of the:

clutch member 134, being adapted toco-act with the shoulder 165 at the end of the groove, as shown particularly in Fig. 12. When the handle 160 is rotated to place-the cam 157 in the position illustrated in Fig. 12, the nut 164 engaging the shoulder'165 holds the clutch member 134 out of engagement with the clutch member 131 so that these clutch members can not engage at the time that the clutch' member 150 engages the clutch member 135, the latter engagement being efl'ected automatically by the action of the coil spring 149 mounted onthe shaft 145. When the operator desires to eifect the manual rotation of the shaft 120 through the shaft 145 and the hand wheel 147 the handle 160 of the cam 157 should be moved to the osition shown in Fig. 12 to prevent the accidentalsimultaneous operation of the' shaft 120 by the motor driven clutch memher 131, and when the motor driven clutch memberis to be operated, the handle 160 "should be-rotated through 180 degrees to the posit-ion illustrated in Fig. 11 where the cam 157 has forced the collar 152i toward the drill head ing theretothiough the flexible conduit 170. 15

The flexible conduit leads from a'junction box 171 having a connection with the conduit 172 in which the feed wires are '10'- cated. The junction box 171 is connected through a short conduit with a switch casing 8 17 3 having mounted therein the switch mechanism for controlling the circuit of the mo-- tor. This switch is illustrated particularly in Figs. 14'to 17, inclusive. The casing 173' comprises a lower body portion 173" having 85 a detachable cover 173', both of which are lined with suitable insulating material174; A shaft-175 is journalled in bearings 176 carried by the end walls ofthe casin and this shaft has fixed thereon a-drum ,1 7 of insulating material carrying contact rings 178 which are adapted to form connections between the contact. fingers 179 mounted on the insulating bar 180 located in the'alpper part of'the casing. The contact fingers" are 95 connected to the electric conductors leading into the casing from the 'uuction box'l'll and the free ends thereo are adapted to bear on the peripheral surface of the drum 177 so that when the; drum isrotated the contact rings arebrought? into engagement with the contact fingers and-the circuit of the motor is closed to effect the rotation" of the motor in'the desiredvdirection or the circuit thereof is opened to discontinue its '0 .eration. The shaft- 175 projects from t a casing 173 and has fixed thereon a rocker 181. A coil spring 182 is mounted 'on the hub of this rocker with the extremities 183 and 184 thereofprojectin upwardly on opsides ofthe lug 18 which is formed p f -on 1e rocker. Theextremities'of the spring also project on opposite sides of another lug .185 which is formed on the upper-end of a lever .185 by which the switch is operated.

This levergis fixed-oil a shaft 186 which extends through the lower part of the casing 173, being-journalled in b'earings"187 carried by the end walls of the casing. The shaft 186 is operated by a crank arin 188 which is no secured theretocat the'end of the switch cas- 'ing opposite the lever 185, and this" crank arm is pivotally connected with a switch a link 190 25 as illustrated "in- Fig. 1. other end of this switch link is ivotall connected to a bell crank lever 19 which is ivoted on the end of the shaft 108 previous y described. The lever 191 has a roj handle 192 which may be engaged by the ophich extends along the side of lgge 125 ecting eratorto efiect the manual operation. of the 4 switch mechanismbut the switch is adapted to be operated, during the automatic operation of the machine, by. means of trip dogs or cams arranged to be engagedby a roller- 195 which is rotatably mounted on the lever,

185 as shown in Fig. 14. l Vhen the lever- 185 is moved toward the right as viewed in Fig. 15,either by the engagement of a dog with the roller 195 or by the manual operation of the switch link 190, the lug 185 engages. the end 184 of the spring 1821' and thereby carries with it the rocker 181 until the lug 196 on the rocker is engaged by the lug 197 on the lever. A further motionof the lever 185 in the same direction continues I V to carry the end 184 of the spring with it while the lug 197 slides under the lug 196, thereby winding up the'spring, due to the fact that the end 183 of'the sp'ring'is held by the lug 181 of the rocker.'and that the rotation of the rocker 'is prevented'by the engagement of the lug 196 with the lug 197. When the lug 197 is moved through the reuired' distance, the lug 196 passes between t 1e lugs 197 and another simila-rlug 197 on the lever 185 and the spring 182 then turns the rocker and the shaft 175 with the result that the contact fingers 179 are connected by the rings 178. When this is accomplished the energy of the spring is gxhausted and the contact rings remain in engagement with the the reverse direction. To bring the contact rings 178 out of engagement with the fingers 179, the lever 185 is moved in the opposite direction, whereupon the lug 185 engages the end 183 of t 1e spring-and carries the rocker with it until the end of thelug '196 strikes onthe under face ofthelug 197 and stops the motion of the rocker while the lug 197 slides over the lug 196 until a point.

is reached where the rocker is free to return .to its original position under the influence of the spring which is partially wound up while the lugs 196 and 197 are in sliding contact with each other. Whenthe lever 185 is moved in the reverse direction, thatis, toward the left from the neutral position illustrated in Fig. 15, theoperation is-reversed and the lugs 196 and 197 control the actionof the spring in permitting a quick release of the rocker to move the contact rings into v engagement fwith the fingers, thereby establishing a circuit through the motor in the reverse direction. Bymeans, of this construction the circuit of the motor is broken .or closed almost instantaneously regardless 215 and when the head ofthe leased by the pawl 207, the p The switch for controlling the operation of 'theeleflctric motor 121xand the'levers for controlling the operation ofxthe clutches'by which. the feed mechanism and the rapid of the angular velocity of the operating le-' I ver 185, which may be moved very slowly. 1n some instances.

traverse mechanism are operated, a-re'controlled by means of trip dogs or cams which .are mounted on the-vertical trip rods'200, 201

and 202 extending parallel to each other adjacent to thestandard 21 with their upper and lower extremities mounted in stationary brackets203 carried by the standard. Assumin that the machine has been set in operation initially, with the drill head 25 in the upper part of its path ofimovem'ent by manually operatinglthe bell crank lever. 191 to actuate the electric switch for closing the circuit of the motor 121, the head 25 moves downwardly until it is arrested by the operation of the mechanism illustrated particularly in Figs. 3 and 4.. The plate 63 in which the shaft 60 is journalled carries a pin 204 having pivotally mounted thereon a trip lever 205 and a latch member-206. The

lever carries at its lower end .a transverseplate 207 provided with an upwardly extending pawl 207, whilethelatch member 206 is provided at one end with a downwardly extending'pawl 206 andat the other end with a transverse lug 206 adapted to be engaged by the trip lever 205 when it is tilted-toward the right, as viewedin Fig. 3. When the drill head 25 has reached a predetermined positionin its downward movement,-that is,-. a position which will locate the points of the drills in proximity to the surface of the object to be drilled, the end of the trip lever 205 engages a dog or cam'208 which is pivoted on a block 209 adjustably secured on.

the trip rod 201 by means of a set screw 210. The dog 208 is normally held in a horizontal position by the engagement of the under side thereof with a lug 211 projectin laterally from the block 209. The dog 208 as an upper inclined 'cam face 208 which contacts withthe extremity of the trip lever 205 and as this, lever'isswung upwardly about its pivot, the pawl 207 releases the hand- 212 of a plunger 213' slidably mounted in the block 214 projecting from the face of'the plate 63. The head 212 is provided with a socket engaged by one end of a coil spring plunger is reunger moves toward the right, as viewed in Fig.8, thereby operating the lever 216whic'h is mounted on 'the'shaft 102. The" rotation of the shaft 102 turns the lever 101, and the pin 100 on the lever. engaging the notch 103, moves the brackt 77 inwardly until" the feed worm.

66 meshes with the worm wheel 65. At the same time, the movement of the pin 100 perinits the arm 92'to be moved upwardly by the coil spring 96 sothat thel'atch late 93 is brought into position engaging t e plate 95, at the lower end of the member 85, as illustrated in Figs. 6 and 7, thereby holding the worm wheel in mesh with the worm while the head is being fed downwardly during the working stroke. At thesame time, the

' lever 205 with the lug 206", until it clears the ably mounted in a 214. The head 217" of this plunger is head 217' of the plunger 217 which is slidgui eway 217" carried by cut with the guideway rovided with a socket to receive one en of the coil spring 215 which extends between the plate 63in ali this plunger and the plunger 213 previously 1 described, so that when the. pawl 206 releases the plunger 217, it is, moved toward the left as viewed in Fig 3, until the spring 215 is completely expanded; The drill head 25' then continues its relatively slow downward movement until a predetermined limit is reached, this limit being determined by the thickness-of the workbeing operated upon.

- When-thislimit is reached, the rol1er195 on .the'switch' lever 185 engages a dog or earn 222 'carried by thebloc 223,'which is adjustably mounted on the trip rod 200, with the result that the switch lever is thrown over to-set the rapid traverse motor 121 in operation in a direction adapted'to effect the elevationof the drill head when the clutches 7-131-and 134 areengaged; At the same time, the trip lever 97, previously described, strikes the dog- 224 which; ispadjustably mounted onthe trip rod 202-and the point of the lever follows the inclined face of the trip dogwith the result that the lever is moved upwardly and 'inwardl against the tension'of the spring 96 until t e member .is released by the latch plate. 93. When the latch late isdi'sengaged from the .member 85 the p unger 80 ismoved outwardly by the coil spring 82 thereby causing an outward movement of the bracket 77 and a disengage-.

ment of the worm 66 with the worm wheel 65. Theoutward movement of the bracket Y 77 operates through the pin to turnthe lever 101 and the shaft 102,- thus moving the lever 216 toward the left, as viewed in Fig. 3, until it reaches a position wherein the pawl 207" snaps upwardly behind the head 212 of the plunger, this movement of the paw-lbeing effected by the weight ofjthe trip lever 205 by which it is carried. The turning of the shaft 1102 also actnates the 215 is then fully compressed and shiftrod 106 with the result that the rapid traverse clutches 131 and 134 are en aged and. the drill head 25 is moved ra i y in the upward direction. As the hea moves upwardly, the lever 205 engages the under side of the trip dog 208 and swin it upwardl about its pivot. When the le v passe the dog 208 drops again to its normal position resting on the lug 211. the head 25 approaches the upper limit of its travel, the outer end of the plunger 217 en.- gages the inclined face of the dog 226 which is adjustably mounted on the trip rod 201, with the result that the spring 215 is compressed until the pawl-206 is permitted to drop into position enga ing the shoulder on the head 217' of the p un er. The sprlng or has both of the I plungers 213 and 217 are held by the pawls 207 a and 206 respectively, in readiness for a ,8:

succeeding downward movement of the drillhead. Immediately after thisoccurs,

the'roller 195 on the switch lever' en-' gages the trip dog 227 carried by the block 228 which is adjust-ably mounted on the 1'1 per part of the trip rod 200 thus causing t 1e switch to bethrown to its neutral position and arresting the operation of the rapid traverse motor 121. The momentum of the drill head and other moving parts will cause a'limited upward movement of the roller '195and the switch lever 185- after they are moved to neutral position, with the result that the roller enga 'esthe' trip dog or cam 229 carried by the block 230, which is adjustably mounted on the trip rod 200'just above the block 228. The dog 229 throwsthe switch lever 185 into a position adapted to cause a forward rotation of the motor 121 with the result that the drill head'25 'immediately begins a rapid return movement in' the downward direction. As the drill head travels downwardly the lever 205 engages thetrip dog 208 again, when the points of the drill are in proximity to the surface of the object tobe drilled, causing the disen-v M It will be apparent from the foregoing dereviously described,

scription that after starting the machine in operation initially, by the manual operation of thehandle 192 to effect the starting of the rapid traverse motor 121, the operation of themachine is entirely automatic. The rapid downward movement of the drill head continues until the drills or taps are in proximity to the surface of the object being worked on, whence the rapid traverse clutches are disengaged and the rapid trav erse motor stopped immediately after the engagement of the power feed worm and worm wheel. This clutch mechanism is so connected with the mechanism by which the worm is moved into engagement with the wormwheel that it is impossible for the rapid traverse to operate simultaneously with the operation of the power feed mechanism. The power feed mechanism operates while the drills or taps are passing downwardly through the work being operated on and when the predetermined limit of this movement is reached, the rapid. traverse motor is started in the reversedirection, the drill head then moves up rapidly until it reaches the upper limit of'its travel where: upon the'direction of rotation of the rapid traverse motor is automatically reversed and the drill head moved downwardly again. The various trip dogs or cams by which these operations are controlled are adjustably mounted on the trip rods 200, 201 and 202 so that any particular step in the operation of-the mechanism may be caused to occur and 150 and the connections from the collar 152 to the clutch member 134, previously described, are such that the rapid traverse clutches 131'and 134 can 'not be engaged simultaneously with the engagement of the manual operation clutches 135 and 150. The circuit of the rapid traverse.

motor 121 and the rapid traverse clutches 131 and 134 may be manually operated by the handles 192. and 110 .respectively,'these' fhandles effecting: the o e'ration- .of-the rods =190 andIOG respective indepen dentl of the automatic trip do mechanism. his manual control is of vantage in starting the operation of the'drill and alsoin arresting and controlling its operation at will du'ring the operation of. the machine. It will be apparent that, in a drilling" machine or other machine to which the invention may be applied, the advantages of manual con trol are'obtained in combination with the operation of the power feed mechanism.

Although .one embodiment of the invention has been shown and described for pur- 1 poses of illustration, it will be understood that the invention may be constructed and applied in various other forms and ways without departing from-the scope of the appended claims. The electric switch mechanism, herein shown and. described, is not claimed but will'be covered in a separate divisional application.

We claim: 1

1. A drilling machine combining a frame; a drill-head translatably mounted on the frame; a rackarranged lengthwise of said frame; a pinion rotatably journaled in said drill-head and meshing with said rack an electric motor mounted on. said head; an operative connection between said motor ahd said pinion whereby the former may rotate the latter to effect rapid traverse o'fthe drill head; a motor controlling switch carried by said drill-head; manual means to actuate said switch to cause said motor rapidly to traverse said head; .and automatic means controlled by the movement. of said head to I actuate said switch to discontinue the rota- .tion of said motor and thereby the move- -ment of said head.

Y 2. A drilling machine combining a frame; a drill-head translatably mounted onthe .frame; a rack arranged lengthwise of said frame; a pinion rotatably journaled in said drill-head and meshing with said rack; an"

.electric motor mounted on said head; an operative connection between said motor and said pinion whereby the former may rotate the latter to efle'ct rapid traverse of the drillhead; amotor-controlling switch carried by said drill-head; manual means to actuate said switch to cause said motor rapidly to traverse said head; automatic means controlled by the movement of said head to actuate said switch to discontinue the rotation of said motor and thereby themovement of said head; and means independent of said.

motor to give'said drill-head a slow feeding movement.

3. A drilling machinecombining a frame,

a drill-head translatably mounted on the frame; a plurality of spindles rotatably journaled in said drill-head; a prime-mover; means actuatedby said prime-mover to rotate said s indles; a bar extending length. wise of sai frame a rotatable member jour-' naled in said drill-head and engaging saidbar; an electric-motor mounted on said 'drill-' head;'a high speed operative connection be'- tween said motor. and said rotatable member whereby rotation of the motor efi'ectsrapid I traverse of said head; a slow speed drive between-said prime-mover and said rotatable member to give to said drill-head slow' feeding movements; and automatic means actuated by the movement of the drill-head to discontinue the rapid traverse and to start said slow feed mechanism.

4. A drilling machine combining a frame;

a drill-head translatably mounted thereon;

drill-spindles rotatably journaled in said drill-head; a prime mover; ,means actuated by said prime-mover to rotate said spindles; a rack arranged-lengthwise of said frame;

a' pinion rotatably supported by said head and meshing with said rack; a reversible electric motor mounted on said head; a high a actuate said switch to stop said motor; automatic means to render effective said slow speed drive; and means actuated by the movement of the head'under' said sl'ow feed.- ing means to actuate said switch to. cause said motor to rotate in the reverse direction rapidly to retract the drill head,

5. In a. machine of the class described, a movable head,-means including an operating shaft for moving said head, a power driven feed shaft, means for operatively connecting sai shaft, a hlgh speed power driven shaft, means for detachably forming-an operative connectionof said high speed shaft with i said operating shaft, means controlled by the movement of the; head for rotating the high speed power driven shaft in a forward and'a reverse direction, and means for auto matically effecting the alternate operative connection of said operating shaft with said feed shaft and said high speed shaft.

6. In a machine of the class described, a

movable head, means including an operating shaft-for moving said head, a power driven feed shaft, means for operativelyfconnecting said feed shaft and said operating shaft, a high speed power driven shaft, means for operatively connecting said high speed shaft with said operating shaft, means for rotat-- ing said high speed power driven shaft in a forward and in a reverse direction, and means actuated b the movement of said head for automatically effecting the alternate operative connection of said operating shaft with said feed shaft and said high speed shaft, and for controlling the direction of rotation of the high speed power driven shaft.

7. In a machine of the class described,

movable head, means including an operating shaft fdr moving said head, a power driven feed shaft, means for operatively con necting said feed. shaft and said operating shaft, a high speed power driven'shaft rotatable in a forward and in a reverse direc;

feed shaft and said operatingtion, means for operatively connecting said high speed shaft with said operating shaft,

means for automatically effecting the alternate operative connection of said operating shaftwith said feed shaft and said high speed shaft, and means for automatically reversing the direction of rotation of said high speed shaft.

8. In amachine of the class described, a movable head, means. including 'an operatving shaft for moving said head,a power driven feed shaft, means for forming an operative connection between said feed shaft' and said operating shaft, apower driven high speed shaft, means comprising a clutch for forming a drivlng connect on between" high speed 'shaft and said operating shaft,

means for disconnecting said clutch and simultaneousl forming'a connection between said feed s aft and said operating shaft after a predetermined movement of said head,"means for engaging said clutch and disconnecting said feed shaft andsaid operating shaft after a further predetermined movement ofsaid head in the same direction, means for reversing the direction of rotation of said high speed shaft to'eife'ct' a reverse movement of said head, and means operative after a" predetermined reverse movement of said head for again reversing the direction of rotation of saidhigh speed shaft.

9. In a machine of the class described, a

movable head, means including an operating shaft for moving said head, a power driven .feedshaft, means for forming an" operative connection" between said feed shaft and said operating shaft, a power driven high speed shaft, means comprising a' clutch for forming a driving connection between high speed shaft and said operating shaft means for' disconnecting said vclutch an simultaneously forming a connection between said feed. shaft and said operating shaft after a predetermined movement of said head, means for engaging said clutch and disconnecting said feed shaft and said;

operating shaft after a predetermined move nient of said head ,in the same direction,

means for reversing the direction of rota tion of said high speed shaft to effect a re verse movement of said head, means'operative' after a predetermined reverse movementof said head for again reversing the direction of rotation of said high speed of operation of said feed shaft and said high speed. shaft.

10. In a machine of the class described, a movable head, operatmg means for said head, means comprising a feed shaft. for. driving sald operating means, means com-- prising a high speed shaft for driving said opshaft, and means for adjusting the periods eratlng means, a motor for driving said high speed shaft, means comprising a clutch for connecting said motor with said high speed shaft, means for automatically opening said clutch and forming an operative connection between said feed shaft and said operating mechanism, and means for arresting the operation of said motor when said .clutch 1s opened.

I 11, In a machine of the class described, a .movable head, operating means for moving said head, a shaft for driving said operating means, a motor fordriving said shaft, a clutch member rotatably mounted on said shaft and. driven by said motor, a second clutch member slidably mounted on said shaft, a manually operated shaft mounted in alignment with said first named shaft, a third clutch-member secured on said first named shaft, a fourth clutch member slid ably and non-rotatably mounted on said manually operated shaft, and connections between said second and fourth named clutch members'for insurin their alternate operation in engaging sai first and third named clutch members respectively. a

12. In a machine of'the class described, a' movable head, operatmg means for moving said head, a shaft for driving said'operating means, a motor fordriving said shaft, a clutch'member rotatably mounted on said shaft and driven b shaft, a manually o erated shaft mounted in alignment with sai first namedshaft, athird clutch member secured on said first named shaft, a fourth clutch member slidabl and non-rotatablymounted on said manual y op- T erated shaft, means tending normally to V move said fourth named'clutch member into enga ement with" said thirdnamed clutchmem er, and means for preventing said en gagementv except whensaid second named clutch member is out of engagement with v said first named clutch member.

',13. In a machine-of the'class'described, a movable head, operating means for 'moving said head, hi h speed mechanism mounted on said head or actuating saidoperatin'g means, 'means for mechanically connecting.

said high speed mechanism withsaid operating means, a trip roda tripdo mount ed said-rod, and a trip leyer mova le with said head and actuate by the engagement thereof with said trip dog for efiectmg the disconnection of said high speed mechanism and said operating means. a v

'14. In amachine of the class described,

- a movable head, operating means for sald head, high speed mechanism for'actuating said operating means, means forconnecting said high speed mechanism with said operating means, a' trip rod, a'trip' dog mounted on said rod, a tri lever movable with said 7 head and actuate by the engagement there- .of with said trip do for effecting the disconnection of said 'gh speed me said motor, a secondclutchmember sli ably mounted on said.

determined movement of said head.

and said operating means, a motor'for driving said high speed mechanism, a motor controlling switch movable with said head, a second trip rod, and a dog mounted on said second trip rod to effect the actuation of said switch after a predetermined movement of said head.

15.' In a machine of the class described, a 4 movable head, means comprising an operating shaft for moving said head, a feed shaft, clutch mechanism for forming a driving engagement between said feed shaft and said operating shaft, a high speed shaft, means including a clutch for forming an operative connection between said high speed shaft and said operating shaft, latch mechanism tending to maintain the connection of said feed shaft with said operating shaft, and means actuated by the movement of said head for releasing said latch mechanism, dis

'connectingsaid feed shaft and said operating shaft and engaging said clutch to effect, the operation of saidoperating shaft by said high speed shaft. 2

' 16. In a machine of the-class described, a movable head, operatingmeans for moving said head, a shaft for driving saidoperating means, an electric motor supported on said head for driving said shaft, an electric circintfor said motor, a switch for controlling the operation of said motor circuit, an operatin member controlled by'the movement of. sai head for actuating said switch, and 4 a. dog engaging saidoperating member for opening t eccircuit of said'motor after a pre:

17. Ina machine of the class described, a. frame, a movable head, operating means for moving said head, a shaft for driving said operating means, an electric motor sup- "ported by said head for driving said shaft, annelectric circuit for said motor, a switch III nism for moving said head, rapid traverse mechanism for moving said head, an electric motor mounted on said head for driving said rapid traverse mechanism, an electric circuit for said motor, switch mechanism carried by said head and connected in said circuit and means actuated by the movement ofsaid head for controlling the operation of said switch. a

19. In a machine of the class described, a

movable head, power feed mechanism forand means actuated by the movement of said head for controlling the operationof said switch, and separate means actuated bythe movement of said head for controlling the operation of said power feed mechanism.

20: In a machine of the class described, a movable head, power feed mechanism,

clutch mechanism for'con'necting said power feed mechanism to move said head, rapid traverse mechanlsm, clutch mechanlsm for connecting said rapid traverse mechanism to" move sald head, an electric motor mounted. on the head for,dr1v1ng said rapid traverse mechanism, an electric circuit for said motor, a switch connected in said circuit,- means actuated by the movement of' said head for controlling the operation of said switch,- and means actuated by the movement of said head for controlling the operation of each set of clutch mechanism.

21. In a drillingmachine, the combination comprising a frame; a drill head slidably mounted on said'frame; means. comprising a rotatable member for moving the head along said frame; slow power means carried by said frame for rotating said rotatable member to give said head a feeding movement; a high speed rapid traverse motor mounted on said head; and. a single clutch controlled by the movement of the head for connecting the motor to said rotatable member.

22. In a drilling machine, the combination comprising a frame; a drill head slidably mounted onsaid frame; means comprising a rotatable member for moving the head along said frame; a motor, mounted on said head; a single clutch controlled by the movement of the head for connecting the motor to said rotatable member; and means for selectively operating said motor in a forward and in a reverse direction under the control of the moving head.

23. In a drilling machine, the combination comprising a frame; a drill headslidably mounted on said frame; means comprising a rotatable shaft for effecting movement of thehead along the frame; a prime mover mounted on the head; a single clutch controlled by the movement of the head for connecting the prime moverto said rotat able member, said prime mover serving to effect a traverse movement of the head at a relatively rapid'rate; and means-for auto- -matically controlling said prime mover in accordance with the movement of the head. 24. In a drilling machine, the combination comprising a frame; a drill head slidably mounted on said frame; means comprlsing a rotatable member for. effecting .movement-of the head along the frame; a prime mover mounted on the head for operating said member to effect traverse operation of the head; means comprising a feed shaft mounted on the frame for operating the member to effect feeding movement of the head; and means for selectively operating said member by the prime'mover and the feed shaft in accordance ment of the head.

25. In a machine tool, the combination with the movecomprisingfl tool head slidablymounted on lectively connecting the feed mechanism and the high speed power mechanism to said member. i

26. .In a drilling machine, the combination with a frame; a tool head 'slidably mounted onsaid frame; means comprising a rotatable member for effecting movement of the head along the frame; a motor mounted on said head; means comprising a clutch mechanism for operatively connecting the motor to'said member; a feed shaft mounted on the frame;

a clutch mechanism for connecting the feed shaft to saidmember; and means for selectively operating said two clutch mechanisms in accordance with the movement of the 27. In a drilling machine, the combination with a frame; a tool head slidably mounted on said frame; means comprising a rotatable member for effecting movement of the head along the frame; a motor mounted on said head; means comprising a clutch mechanism for operativelv connecting the motor to said member; a feed shaft mounted on the frame; a clutch mechanism for connecting the feed shaft to said member; and means for selectively operating the motor in a forward and in a reverse direction and.

ing a feed shaft for driving said operating means and mounted on the machine frame; means, comprising a lngh speed shaft for driving said operating means, said high speed shaft being mounted on said head; a I

motor for driving said high speed shaft;

means comprising a single clutch for con-- ncting said motor with said high speed shaft; means for automatically opening said clutch and formlng an operative connection between said feed shaft and said operating mechanism; and means for opening the circuit of said motor when said clutch is opened. v

29. In a machine'tool, a tool head movable along the frame of the machine; operating means for said head; means comprising a feed shaft for driving said operating means; means comprising a high speed shaft for driving said operating means; a motor operable ina forward and in a reverse direction for driving said high speed-shaft; means comprising a clutch for connecting said motor with said high speed shaft :jsmcans for automatically opening said clutch and forming an operative connection between said feed shaft and said operating mechanism;

and means controlled in accordance. with the movement of the head for opening the circuit of the motor when said clutch is opened.

30. In a machine tool, the combination comprising a tool head movable along the frame of the machine; operating means for said head; means comprising a feedshaft for driving said operating means; a clutch mechanism for connecting the feed shaft to said operating means; means comprising a high speedshaft for driving said operating means; a clutch mechanism for connecting the high speed shaft to said operating means; a motor for driving said high speed shaft; and means controlled in accordance with the movement of the tool head for selectively operating said two clutch means and for selectively operating the motor in a forward and in a reverse direction.

ROBERT M. GALLOl/VAY. PAUL G. BURTON. 

